Was never a fan until last nights performance on AGT. I never heard "Smile" before and immediately after I went on Amazon.com to hear a sample and noticed the sound was different on one of the guitars which led me to believe you were actually playing live. Its hard to believe it sometimes when a performance is that great sounding. My opinion is that this "live" version blows away the studio version. It is a version definitely fit for disc. It was awesome and ROCKED! I could go on and on as to why but, I will be in Avril mode until I get my fill, musically (CD's/DVD's).